Shockproof mounting for a high power high frequency amplifier system



April 18, 1933. L..A. GEBHARD El AL SHOCKPROOF MOUNTING FOR A HIGH POWER HIGH FREQUENCY AMPLIFIER SYSTEM Filed Dec.

31, 1930 3 Sheets-Sheet l INVENTORS ovu), y 1

@o/ww $71 914400! fi /d a-wa MTTORNEY A ril 18, 1933. 1.. A. GEIBHARID El AL 1,903,812.

SHOCKPROOF MOUNTING FOR A HIGH POWER HIGH FREQUENCY AMPLIFIER SYSTEI Filed Dec. 31, 1.950 3 Sheets-Sheet 2 III-:51;- E

v Z6 a? INVENTORS ATTORNEY April 18, 1933. Y 1.. A. GEBHARD Ef AL SHOCKPROOF MOUNTING FOR A HIGH POWER HIGH FREQUENCY AMPLIFIER SYSTEM 3 Sheets-Sheet 3 Filed Dec,

INVENTORS Patented Apr. 18 1933 UNITED STATES VVPA'TENTJ OFFICE IiOUIS A. GEBHARD AND 'JORRIE F. BUDOLI PH, OF WASHINGTON, DISTRICT OF COLUMBIA,

Assrenons. 'lO WIRED RADIO, Inc; or WARE p I snocxraoor MOUNTING For; a HIGH rowan HIGH FREQUENCY AMPLIFIER SYSTEM Application filed December 31, 1930. Serial No. 505,860.

:Our invention relates broadly to high fre'} quency transmitters and more particularly to means for'mounting parts of the transmitter in shock proof manner. 7 r

One of the objects of our invention is to provide a shock proof mounting for high frequency transmitters in which the tubes, associated cooling systems, and interconnected inductances are supported in a manner which prevents excessive vibration fromimpairing the operation of the transmitter.

Another object of our invention is to provide a constructionof shock proof support for the parts of a high frequency transmitter wherein the parts of the'transmitter are suspended from diametrically opposite points on the frame for preventing changes in relative position of the parts of the transmitter under conditions of mechanical vibration;

Other and further objects of our invention reside in the construction of shock proof mounting forhigh frequency transmitters as set forth more fully in the specification hereinafter following by reference to the accompanying drawings, wherein:

Figure 1' is an elevational view of a radio transmittershowing theshock proof mounting structure of our invention; Fig. 2 is-a side view of the tube supports and inductance system mounted in accordance with my invention; Fig. 3 is a vertical sectional View through one of the shock proof supports; Fig.- 4 is a sectional-view through the shock proof mounting. taken on line 44 of Fig. 8; Fig. 5 is a transverse vertical section on line 55 of Fig. 3; and Fig. 6 is a similar View, showing the parts before assembly.

The structure of our invention prevents excessive vibration being transmitted to the vacuum tubes in a radio transmitter and to fragile insulating parts. The vacuum tubes 1 and 2 ofthe push-pull amplification system of the transmitter are mounted in water jackets 3 and 4 which form parts of a con-; denser system 5. This condenser system includes the balance and output tuning con denser. The output coil system to which the condensers are connected is shown at 6. These units are supported in aframe consistingof verticalmembers 8 and horizontal longitudinal members 9 and. horizontal CI'OSSIYI'lGIIlbGlS- 10. The unit isnsupported from horizontal longitudinal members 9 through shock absorbing units. 11 from the frame work of the transmitter which is shown at 12. Clearance holes are provided in the front panel 13 of the radio transmitter to permit controls 14, 15 and 16 of the balance condenser, output tuning condenser and antenna coupling, respectively, to be made accessible from the frontpanel of the radio transmitter. Sighting holes are also provided for the counting mechanism adj acent to. controls and used for indicating the adjustment. Flexible connections are provided extending to the coil 7 as shown at 17' for the antenna and ground connections or the transmission line. Connections are provided at 18' to the inductan'celswitch. system 19 which connects inductance coils 20, 21 and 22 in parallel with the coil 6 to give the proper frequency ranges." Connection 17 may be madeof flat metallic strip. An insulated frame is supported by the auxiliary frame 8 and provides mounting means for the inductances 20, 21, and 22, which are thus protected against shocks and jars in a manner similar to the mounting of the condenser and main inductance system. Flexible connections 23, 24 and 25 provide connection to the balance condenser grids of tubes 1 and 2 and filaments of tubes 1 and 2 respectively. An additional flexible connection is made to the center of coil 6 to provide a means of connecting the source of energy to the anodes ofthe fluid cooled tubes. In order to feed the cooling fluid t0 the anodes of the tubes, coil 6 is tapped at its center and a flexible insulating tubing connection 6 is made between this point and the'top of the insulating tube coil. The

latter is necessary to prevent a short circuit of the source of anode potential through the Details of the shock absorbing unit 11 are shown more particularly in Figs. 3 to 6'. Inasmuch as all of the units are identical in construction, a detailed construction covers the construction of the' plurality of these units employed throughout the structure;

NEW YORK, 11. Y., A co'nrona'rron or DELA- e Fig. 3 shows a cross-sectional view in which a sleeve member 11 is separated from the core 26 by means of several sections of sponge rubber 27. The sponge rubber is confined between the washer 28 and the flange 26?). A View before compressing the sponge rubber sections is shown in Fig. 6, for instance.

Fig. 4: shows a cross sectional view taken on line 44 of Fig. 3. The unit is held together by means of screw 29. Screw 80 is used to fasten the device as an entirety to the horizontal members 9. Sleeve member 11 has an integrally formed, flat, triangular, or isosceles shaped web 31, adapted to be fastened to the framework 12 of the transmitter by means of the screws 32 which pass into threaded holes in the flange 31. The core 26 is provided with a screw threaded bore 26a adapted to be engaged with the screw 30 which passes through the longitudinally ext-ending frame members 9. The core 26 is also provided with an integral annular flange 266 which serves to center the core 26 with respect to the sponge rubber sections. The core 26 is also provided with a smaller bore 260, engaged by the threads of the screw 29. Thus it will be seen that by employing the method of compressing the sponge rubber section, that the latter material is subjected to a densing of its structural fiber, thus materially adding to the efficiency of the shock proof mountin The resilient suspension members are disposed at diametrically opposite points along the main frame of the transmitter. The auxiliary frame of the transmitter is thus resiliently mounted in a shock proof manner within the transmitter frame. The fact that a uniform suspension is provided for the auxiliary frame from opposite sides of the main frame assures a mechanical balance for the several elements on the auxiliary frame, while permitting the adjustable controls to be aligned through apertures in the main transmitter frame. The leads extending from the several elements on the auxiliary frame and the water cooling connections are sufficiently resilient to prevent the transfer of shock vibration to the transmitting apparatus. Each of the sponge rubber mounting devices 11 may be readily renewed in the event of fatigue of the rubber so that live rubber parts may be maintained within the suspension members to insure a springy mount for the apparatus.

While we have described our invention in certain of its preferred embodiments, we desire that it be understood that modifications may be made and that no limitations upon our invention are intended other than those imposed by the scope of the appended claims.

What we claim as new and desire to secure by Letters Patent of the United States is as follows:

1. A shock proof mounting for parts of a high frequency transmitter comprising an outer frame structure, an inner frame structure, insulated strip members extending laterally of said inner frame structure and projecting beyond the limits thereof, electron tube apparatus supported by said inner frame structure and diametrically op )osed resilient suspension members connected etween opp0- site ends of said insulated strip members and said outer frame structure for insulatingly and flexibly suspending the electron tube apparatus on said inner frame structure within said outer frame structure.

2. In a radio transmission system, an outer frame structure, an inner frame structure mounted within said outer frame structure, a high frequency inductance carried by said inner frame structure, condensers mounted on said inner frame structure, electron tubes supported on said inner frame structure adjacent said condensers, a plurality of lateral insulated strip members extending parallel to each other and secured to said inner frame structure and projecting beyond the limits thereof to positions adjacent said outer frame structure, and resilient means extending between the ends of said strip members and said outer frame structure for eliminating the transmission of shock vibration from said outer frame structure to said inner frame structure.

3. In a high frequency transmission system, an outer frame structure, an inner frame structure, sets of insulated strip members ex tending respectively parallel to each other laterally of said inner frame structure, said sets being respectively positioned in separate parallel planes disposed one above the other, a high frequency inductance supported by said inner frame structure, condenser systems carried by said inner frame structure, electron tubes supported adjacent said condenser systems, means extending from said high frequency inductance and said condensers for changing the effective values thereof, said means extending through said outer frame structure from said inner frame structure, and flexible means for suspending said strip members of said inner frame structure with respect to said outer frame structure.

4. In a high frequency transmitter, an outer frame structure, an inner frame structure mounted within said outer frame structure, sets of insulated strip members extending respectively parallel to each other laterally of said inner frame structure, said sets being respectively positioned in separate parallel planes disposed one above the other, a multiplicity of electron tubes condensers, and a high frequency inductance carried by said inner frame structure, said inductance unit projecting beyond said outer frame structure, adjustable means extending from said inner frame structure and movably projecting through said outer frame structure for controlling the effective values of said inductance and condensers on said inner frame structure, and resilient means for suspending said strips of said inner frame structure with respect to said outer frame'structure, the resilient means supporting the strips in a given plane being diametrically opposite each other.

5. A high frequency transmission system com rising an outer frame structure, an inner rame structure disposed within said outer frame structure, sets of insulated strip members extending respectively parallel to each other laterally of said inner frame structure, said sets being respectively positioned in separate parallel planes disposed one above the other, inductance and capacity units mounted upon said inner frame structure, electron tubes supported by said inner frame structure, adjustable control means extending through said outer frame structure and supported by said inner frame structure for varying the effective value of the inductance and capacity elements supported on said inner frame structure, and means for resiliently suspending the ends of said strips of said inner frame structure within said outer frame structure.

6. In ahigh frequency transmission system, an outer frame structure, an inner frame structure, sets of insulated strip members extending respectively parallel to each other laterally of said inner frame structure, said sets being respectively positioned in separate parallel planes disposed one above the other, shock proof means supporting said strip members of said inner frame structure with respect to said outer frame structure, inductance and capacity units mounted on said inner frame structure, electron tubes carried by said inner frame structure, and control means for said inductance, capacity units, and electron tubes, projecting from said inner frame structure and extending through enlarged apertures in said outer frame structure whereby said inner frame structure is free to shift within said outer frame structure without confinement of said control means with respect to said outer frame structure.

7. A high frequency transmitter compris-.

ing in combination an outer frame structure, an 1nner frame structure, sets of insulated strip members extending respectively par-l allel to each other laterally of said inner frame structure, said sets being respectively positioned in separate parallel planes disposed one above the other, shock proof means suspending said strip members of said inner frame structure within said outer frame structure, inductance and capacity elements supported by said inner frame structure, electron tubes mounted on said inner frame structure, a multiplicity of adjustable controls each adapted to change the effectivevalue of 'said'capacity and inductance elements, said =controls projecting through enlarged aperturesin said outer frame structure and operative from the 'exterior of said outer frame structure independent of vibratory movement of said inner frame-"structure within said outer frame structure. V v

8. High frequency signaling apparatus comprising an outer frame structure, an inner frame structure disposed within said outer frame structure, sets of insulated strip members extending respectively parallel to each other laterally of said inner frame structure, said sets being respectively positioned in separate parallel planes disposed one above the other, means for resiliently supporting said strip members of said inner frame structure with respect to said outer frame structure, inductance and capacity units mounted upon said inner frame structure, electron tubes carried by said inner of limiting connection therewith for adjusting the units on said inner frame structure without transmitting shock vibration thereto.

9. High frequency transmission apparatus comprising an outer frame structure, suspension means connected to said outer frame structure, an inner frame structure disposed within said outer frame structure, laterally extending insulation strips on said inner frame structure, shock proof connections between the suspension means on said outer frame structure and said laterally extending insulation strips for effectively supporting said supplemental frame structure without transferring shock vibration thereto, electron tubes and associated inductance and capacity units supported by said inner frame structure, and control members extending from said electron tubes and said capacity and inductance elements and projecting through said'outer frame structure without limiting connection therewith for effecting adjustment without transmitting shock vibration to said inner-frame structure.

10. High frequency signaling apparatus comprising an outer frame structure, an inner frame structure, insulation strips extending laterally of said inner frame structure, flexible means interposed between opposite extremities of said laterally extending outer frame structure for adjustment exterior thereof Without limiting connection therewith for preventing the transfer of shock vibration to the apparatus on said inner frame structure.

LOUIS A. GEBHARD. CORRIE F. RUDOLPH. 

